Significant Figures Converter
Round numbers to the desired significant figures
Significant Figures Rules
- 1. All non-zero digits are significant (123 has 3 sig figs)
- 2. Zeros between non-zero digits are significant (102 has 3 sig figs)
- 3. Leading zeros are not significant (0.0012 has 2 sig figs)
- 4. Trailing zeros after decimal are significant (1.200 has 4 sig figs)
- 5. Trailing zeros in whole numbers may or may not be significant
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: NIST Guide to SI Units
by National Institute of Standards
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.